Environmental Monitoring and Audit for Contaminated Mud ... · FOR CONTAMINATED MUD PITS AT SHA CHAU MARCH 2013 1.1 BACKGROUND 1.1.1 Since 1992, the East of Sha Chau (ESC) area has

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Environmental Monitoring and Audit for Contaminated Mud Pit at Sha Chau (2009-2013) – Investigation Agreement No. CE 4/2009(EP)

45

th Monthly Progress Report for

Contaminated Mud Pits at Sha Chau – March 2013

Revision 0

16 April 2013

Environmental Resources Management

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Environmental Monitoring and

Audit for Contaminated Mud Pit at

Sha Chau (2009-2013) –

Investigation

45th Monthly Progress Report for

Contaminated Mud Pits at Sha Chau –

March 2013

Revision 0

Document Code: 0103262 Monthly Progress Mar 13_v0.doc

Environmental Resources

Management

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25 Westlands Road

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Hong Kong

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Client:

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Project No:

0103262

Summary: Date:

16 April 2013

This document presents progress of monitoring works on

contaminated mud pits at Sha Chau in March 2013 under

Agreement No. CE 4/2009 (EP).

Approved by:

Dr Robin Kennish Director

0 45th

Monthly Progress Report for ESC CMP RC JT RK 16/4/13

Revision Description By Checked Approved Date

This report has been prepared by Environmental Resources Management the trading name of ‘ERM Hong-Kong, Limited’, with all reasonable skill, care and diligence within the terms of the Contract with the client, incorporating our General Terms and Conditions of Business and taking account of the resources devoted to it by agreement with the client. We disclaim any responsibility to the client and others in respect of any matters outside the scope of the above. This report is confidential to the client and we accept no responsibility of whatsoever nature to third parties to whom this report, or any part thereof, is made known. Any such party relies on the report at their own risk.

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Confidential

Ur^rfsfEE=Civil Engineering andDevelopment Department

New Contaminated Mud Marine Disposal Facility at Airport EasVEast ShaChau Area

Environmental Certification SheetEP41A2008|A

Reference Document/Plan

Document/Plan-to be€e+tifie<{/ Verified: 45rh Monthly progress Report for Contaminated Mud pits atSha Chau - March 2013

Date of Report: 76/04/2073

Date received by ET: 16/04/2013

Date received by lA:16/04/2013

Reference EP Condition

Environmental Permit Condition: Condition No.: 3.4

Content:

Four hard copies and one electronic copy of monthly r within10 working days after the end of the reporting monnon-compliance (exceedances) of the environmental

ty of all

The submissions shatl be verified by the Independent l^"filiiided to the Director upon request by the Director.

ET Certification

I hereby certify that the above referenced document/plan complies with the above referenced condition ofEP-312/2008/ A

Dr Robin Kennish, Date:76/04/2013Environmental Team Leader:

IA Verification

I hereby verify that the above refereEP-372/2008/ A

Dr Wang Wen Xiong,brdependent Auditor:

document/plan complies with the above referenced condition of

Date: 16/4/2013

CONTENTS

1.1 BACKGROUND 1

1.2 REPORTING PERIOD 1

1.3 DETAILS OF SAMPLING AND LABORATORY TESTING ACTIVITIES 1

1.4 DETAILS OF OUTSTANDING SAMPLING AND / OR ANALYSIS 2

1.5 BRIEF DISCUSSION OF THE MONITORING RESULTS FOR CMP V 2

1.6 ACTIVITIES SCHEDULED FOR THE NEXT MONTH 5

1.7 STUDY PROGRAMME 5

ANNEXES

Annex A Sampling Schedule

Annex B Monitoring Results

Annex C Results of Impact Monitoring during CMP Vd Dredging

Operations for March 2013

Annex D Study Programme

ENVIRONMENTAL RESOURCES MANAGEMENT CIVIL ENGINEERING AND DEVELOPMENT DEPARTMENT

0103262 MONTHLY PROGRESS MAR 13_V0.DOC 16 APRIL 2013

1

Agreement No. CE 4/2009 (EP)

Environmental Monitoring and Audit

for Contaminated Mud Pit at Sha Chau (2009-2013) - Investigation

45TH MONTHLY PROGRESS REPORT

FOR CONTAMINATED MUD PITS AT SHA CHAU

MARCH 2013

1.1 BACKGROUND

1.1.1 Since 1992, the East of Sha Chau (ESC) area has been the site of a series of

dredged contaminated mud pits (CMPs) designed to provide confined marine

disposal capacity for contaminated mud arising from the HKSAR’s dredging

and reclamation projects. In March 2013, the following works were being

undertaken at the CMPs:

• Capping was being undertaken at CMP IVc;

• Disposal of contaminated mud was taking place at CMP Va; and

• Dredging of CMP Vd was in progress.

1.1.2 The Environmental Monitoring and Audit (EM&A) programme for the CMPs

at the ESC area presently covers the above operations.

1.2 REPORTING PERIOD

1.2.1 This Monthly Progress Report covers the monitoring period of March 2013.

1.3 DETAILS OF SAMPLING AND LABORATORY TESTING ACTIVITIES

1.3.1 The following monitoring activities have been undertaken for CMP V in

March 2013:

• Pit Specific Sediment Chemistry was conducted for CMP Va on 12 March

2013;

• Impact Water Quality Monitoring during Dredging Operations for CMP Vd

were conducted on 16 March 2013; and

• Water Column Profiling was scheduled to be undertaken on 26 March

2013. However, there was no dumping activity at CMP Va while the

monitoring team was on-site. As such, in-situ measurements and water

sampling were not undertaken for Water Column Profiling in March 2013.



2

1.3.2 A summary of field activities are presented in Annex A.

1.4 DETAILS OF OUTSTANDING SAMPLING AND / OR ANALYSIS

1.4.1 No outstanding sampling remained and laboratory analyses of Pit Specific

Sediment Chemistry conducted in March 2013 were yet to be completed during

preparation of this monthly report.

1.5 BRIEF DISCUSSION OF THE MONITORING RESULTS FOR CMP V

1.5.1 Table 1.1 summarises the monitoring results that are presented in the current

monthly report. Brief discussion of the monitoring results is presented in

this section. Detailed discussion will be presented in the corresponding

Quarterly Report.

Table 1.1 Monitoring activities in February / March 2013

Monitoring activities Date of

Monitoring

Monitoring results

presented in this report?

Pit Specific Sediment Chemistry Monitoring for

CMP Va

1 Feb 2013

12 Mar 2013

Yes

No. Laboratory analysis

yet to be completed

during preparation of

this monthly report.

Cumulative Impact Sediment Chemistry

Monitoring for CMP Va

7 Feb 2013 Yes

Impact Water Quality Monitoring during

Dredging Operations of CMP Vd

16 Mar 2013 Yes

Water Column Profiling for CMP Va

26 Mar 2013 No. In-situ

measurements and water

sampling were not

undertaken as there was

no dumping activity on

the monitoring day.



3

1.5.2 Pit Specific Sediment Chemistry of CMP Va – February 2013

1.5.3 Monitoring locations for Pit Specific Sediment Chemistry for CMP Va are

shown in Figure 1.1. A total of six monitoring stations were sampled in

February 2013. Concentrations of Arsenic exceeded the Lower Chemical

Exceedance Level (LCEL) at Pit Edge stations NEDA and NEDB and Near Pit

stations NNDA and NNDB. Concentrations of Copper, Mercury and Zinc

exceeded the LCEL at Active Pit station NPDA while concentrations of Silver

exceeded the Upper Chemical Exceedance Level (UCEL) at Active Pit station

NPDA (Figures 1-2 of Annex B). It is also observed that the variations of

metal concentrations at Active Pit Stations were much larger (ie greater

standard deviation) when compared to other stations. Whilst the average

concentration of Arsenic in the Earth’s crust is generally ~2mg/kg,

significantly higher Arsenic concentrations (median = 14 mg/kg) have been

recorded in Hong Kong’s onshore sediments (1). It is presumed that the

natural concentrations of Arsenic are similar in onshore and offshore

sediments (2), and relatively high Arsenic levels may thus occur throughout

Hong Kong. Therefore, the slight exceedances of the LCEL for Arsenic are

unlikely to be caused by the disposal operations at CMP Va but rather as a

result of naturally occurring deposits. In addition, the Active Pit station is

located within CMP Va which was receiving contaminated mud during the

reporting period. As such, the exceedances of LCEL/UCEL for Copper,

Mercury, Silver and Zinc which were recorded at Active Pit station NPDA

only are not considered as indicating any dispersal of contaminated mud from

CMP Va.

1.5.4 For organic contaminants, Total Organic Carbon (TOC) concentration was

similar amongst all stations (Figure 3 of Annex B). Tributyltin (TBT), High

Molecular Weight Polycyclic Aromatics Hydrocarbons (High MW PAHs) and

Low Molecular Weigh Polycyclic Aromatics Hydrocarbons (Low MW PAHs)

concentrations were higher at Active Pit stations NPDA when compared to

other stations (Figures 4 and 5 of Annex B). Total Polychlorinated Biphenyls

(PCBs), Total Dichloro-diphenyl-trichloroethane (DDT) and 4,4’-Dichloro-

diphenyl-dichloroethylene (4,4’-DDE) were below the limit of reporting at all

stations. As described in Section 1.5.3, the higher concentrations of

contaminants (including metals and organic contaminants) recorded at the

Active Pit stations only are not considered as indicating any dispersal of

contaminated mud from CMP Va. Nevertheless, detailed analysis will be

presented in the Quarterly Report to reveal any trend of increasing sediment

contaminant concentrations towards CMP Va.

1.5.5 Overall, there is no evidence indicating any unacceptable environmental

impacts to sediment quality as a result of the contaminated mud disposal

operations at CMP Va during this monthly period.

(1) Sewell RJ (1999) Geochemical Atlas of Hong Kong. Geotechnical Engineering Office, Government of the Hong Kong

Special Administrative Region

(2) Whiteside PGD (2000) Natural geochemistry and contamination of marine sediments in Hong Kong. In: The Urban

Geology of Hong Kong (ed Page A & Reels SJ). Geological Society of Hong Kong Bulletin No. 6, p109-121

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ESC-NECA

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ESC-NNDA

ESC-NPDB

ESC-NEDA

ESC-NPDA

ESC-NEDB

ESC-NNDB

ESC-NPCA

ESC-NPCB

ESC-NECB

ESC-NNCB ESC-NNBB

ESC-NEBB

ESC-NPBB

ESC-NPBA

ESC-NNAA

ESC-NEAA

ESC-NPAA

ESC-NPAB

ESC-NEAB

ESC-NNAB

EnvironmentalResourcesManagement

Pit Specific Sediment Quality Monitoring Stations for CMPVFigure 1.3

File: CMPV\0103262_SQMS_pit specific.mxdDate: 29/10/2009

´0 21

Kilometres

Legend

Pit Specific Stations

#* Pit-Edge Station

!( Near-Pit Station

") Active-Pit Station

Jamius.Yeung

Text Box

Figure 1.1



4

1.5.6 Cumulative Impact Sediment Chemistry for CMP Va – February 2013

1.5.7 Monitoring locations for Cumulative Impact Sediment Chemistry for CMP Va

are shown in Figure 1.2. A total of nine monitoring stations were being

sampled.

1.5.8 Analyses of results for the Cumulative Impact Sediment Chemistry

Monitoring indicated that the concentrations of all metals, except Arsenic,

were below the LCEL in February 2013 (Figures 6 and 7 of Annex B).

Concentrations of Arsenic in sediments from all stations, except for Near Field

station RNB, exceeded the LCEL. As discussed in Section 1.5.3 above,

relatively high natural levels of Arsenic are present in Hong Kong’s marine

sediments and hence the slight exceedances of the LCEL for the Arsenic do not

necessarily indicate any adverse impacts to sediment quality caused by

disposal operation at CMP Va.

1.5.9 The concentration of TOC was similar amongst stations (Figure 8 of Annex B).

TBTs were recorded in sediment samples from all stations except Near Field

station RNB and Capped Pit station RCB with a higher concentration recorded

in Ma Wan station (Figure 9 of Annex B). Concentrations of Total DDT, 4,4’-

DDE, Total PCBs, Low and High MW PAHs were below the limit of detection

at all stations.

1.5.10 Overall, there is no evidence indicating any unacceptable environmental

impacts to sediment quality as a result of the contaminated mud disposal

operations at CMP Va during this monthly period.

1.5.11 Impact Water Quality Monitoring during Dredging Operations of CMP Vd –

March 2013

1.5.12 Impact Water Quality Monitoring during Dredging Operations of CMP Vd was

conducted on 16 March 2013. On the survey day, sampling was conducted

during both mid-ebb and mid-flood tides at two Reference (Upstream)

stations upstream and five Impact (Downstream) stations downstream of the

dredging operations at CMP Vd (Figure 1.3). Monitoring was also conducted

at Ma Wan station. At each station, in-situ measurements of water quality

parameters as well as water samples were taken from three depths in the

water column (ie surface: 1 m below sea surface, mid-depth and bottom: 1 m

above the seabed). Where water depth was less than 6 m, the mid-depth

station was omitted. If water depth was less than 3 m, only the mid-depth

station was monitored.

1.5.13 Monitoring results are presented in Table C1 of Annex C. Levels of Dissolved

Oxygen (DO), Turbidity and Suspended Solids (SS) complied with the Action

and Limit Levels set in the Baseline Monitoring Report (1).

[

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X

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#

#

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Urmston Road

Castle PeakPower Station

Pillar Point

Tuen Mun

Butterfly Beach

Castle PeakBayLung Kwu

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Pak Chau

u

Flood

Flood

Flood

Ebb

Ebb

Sha Chau & Lung Kwu ChauMarine Park

CMPVc

CMPVaCMPVb CMPVd

ESC-RCB

ESC-RCA

ESC-RMA

ESC-RFB

ESC-RFA

ESC-RMB

ESC-RNB

ESC-RNA

MW1

EnvironmentalResourcesManagement

Cumulative Impacts Sediment Quality Monitoring Stations for CMPVFile: T:\GIS\CONTRACT\0103262\Mxd\CMPV\0103262_SQMS_cum impact.mxdDate: 3/12/2012

´0 21

Kilometres

Legend

# Far-Field Station

! Mid-Field Station

X Near-Field Station

" Capped Pits

[ Ma Wan Station

Raymond.Chow

Typewritten Text

Figure 1.2

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EnvironmentalResourcesManagementFile: T:\GIS\CONTRACT\0103262\Mxd\CMPV\0103262_modelling stations2.mxd

Date: 28/11/2012

´0 2 41

Kilometres

Legend

[ Ma Wan Station

G Position of Dredging Activitiy

Upstream/Reference Station

Downstream/Impact Station

Indicative Dredging Impact Sampling Stations for CMPVd Note: The locations of sampling stations will be determined on site

based on current direction and position of dredging activities.

Raymond.Chow

Typewritten Text

Figure 1.3

Raymond.Chow

Typewritten Text



5

1.5.14 Overall, there appears to be no unacceptable water quality impacts causing by

the dredging operations at CMP Vd and no additional measures are thus

considered required except for those stated in the Environmental Permit (EP-

312/2008).

1.6 ACTIVITIES SCHEDULED FOR THE NEXT MONTH

1.6.1 The following monitoring activities will be conducted in the next monthly

period of April 2013 for CMP V:

• Pit Specific Sediment Chemistry for CMP Va;

• Water Column Profiling for CMP Va; and

• Impact Water Quality Monitoring during Dredging Operations for CMP Vd.

1.6.2 The sampling schedule is presented in Annex A.

1.7 STUDY PROGRAMME

1.7.1 A summary of the Study Programme is presented in Annex D.

Annex A

Sampling Schedule

Annex A1 - East of Sha Chau Environmental Monitoring and Audit Sampling Schedule for CMP IV (January 2012 - December 2013)

Tissue/ Whole Body Sampling J F M A M J J A S O N D J F M A M J J A S O N D

Near-Pit Stations

INA *

INB *

Reference North

TNA *

TNB *

Reference South

TSA *

TSB *

Demersal Trawling J F M A M J J A S O N D J F M A M J J A S O N D

Near Pit Stations

INA 1-5 * *

INB 1-5 * *

Reference North

TNA 1-5 * *

TNB 1-5 * *

Reference South

TSA 1-5 * *

TSB 1-5 * *

Capping J F M A M J J A S O N D J F M A M J J A S O N D

Ebb Tide

Impact Station Downcurrent

IPE1 * * * * * * * *

IPE2 * * * * * * * *

IPE3 * * * * * * * *

IPE4 * * * * * * * *

PFC1 * * * * * * * *

Intermediate Station Downcurrent

INE1 * * * * * * * *

INE2 * * * * * * * *

INE3 * * * * * * * *

INE4 * * * * * * * *

INE5 * * * * * * * *

Reference Station Upcurrent

RFE1 * * * * * * * *

RFE2 * * * * * * * *

RFE3 * * * * * * * *

RFE4 * * * * * * * *

RFE5 * * * * * * * *

Flood Tide

Impact Station Downcurrent

INF1 * * * * * * * *

PFC2 * * * * * * * *

INF3 * * * * * * * *

Intermediate Station Downcurrent

IPF1 * * * * * * * *

IPF2 * * * * * * * *

IPF3 * * * * * * * *

Reference Station Upcurrent

RFF1 * * * * * * * *

RFF2 * * * * * * * *

RFF3 * * * * * * * *

Water Column Profiling J F M A M J J A S O N D J F M A M J J A S O N D

Plume Stations WCP1 *

WCP2 *

Benthic Recolonisation Studies J F M A M J J A S O N D J F M A M J J A S O N D

Capped Contaminated Mud Pits III

CPA 1 grab per station *

CPB 1 grab per station *

CPC 1 grab per station *

Reference Stations

RBA 1 grab per station *

RBB 1 grab per station *

RBC 1 grab per station *

"*" = Number of replicates depends on field catch or parameters Sampling completed

Sampling to be completed

2012 2013

Annex A2 - East of Sha Chau Environmental Monitoring and Audit Sampling Schedule for CMP V (January 2012 - February 2014)

Pit Specific Sediment Chemistry Code J F M A M J J A S O N D J F M A M J J A S O N D J F

Active-Pit

ESC-NPDA * * * * * * * * * * * * * * * * * * *

ESC-NPDB * * * * * * * * * * * * * * * * * * *

Pit-Edge

ESC-NEDA * * * * * * * * * * * * * * * * * * *

ESC-NEDB * * * * * * * * * * * * * * * * * * *

Near-Pit

ESC-NNDA * * * * * * * * * * * * * * * * * * *

ESC-NNDB * * * * * * * * * * * * * * * * * * *

Cumulative Impact Sediment Chemistry J F M A M J J A S O N D J F M A M J J A S O N D J F

Near-field Stations

ESC-RNA * * * * * * *

ESC-RNB * * * * * * *

Mid-field Stations

ESC-RMA * * * * * * *

ESC-RMB * * * * * * *

Capped Pit Stations

ESC-RCA * * * * * * *

ESC-RCB * * * * * * *

Far-Field Stations

ESC-RFA * * * * * * *

ESC-RFB * * * * * * *

Ma Wan Station

MW1 * * * * * * *

Sediment Toxicity Tests J F M A M J J A S O N D J F M A M J J A S O N D J F

Near-Field Stations

ESC-TDA * * * *

ESC-TDB * * * *

Reference Stations

ESC-TRA * * * *

ESC-TRB * * * *

Ma Wan Station

MW1 * * * *

Tissue/ Whole Body Sampling J F M A M J J A S O N D J F M A M J J A S O N D J F

Impact Stations

ESC-INA * * *

ESC-INB * * *

Reference

ESC-TNA * * *

ESC-TNB * * *

ESC-TSA * * *

ESC-TSB * * *

Demersal Trawling J F M A M J J A S O N D J F M A M J J A S O N D J F

Impact Stations

ESC-INA * * * * * *

ESC-INB * * * * * *

Reference Stations

ESC-TNA * * * * * *

ESC-TNB * * * * * *

ESC-TSA * * * * * *

ESC-TSB * * * * * *

Capping J F M A M J J A S O N D J F M A M J J A S O N D J F

Ebb Tide

Impact Station

ESC-IPE1 * *

ESC-IPE2 * *

ESC-IPE3 * *

ESC-IPE4 * *

ESC-IPE5 * *

Intermediate Station

ESC-INE1 * *

ESC-INE2 * *

ESC-INE3 * *

ESC-INE4 * *

ESC-INE5 * *

Reference Station

ESC-RFE1 * *

ESC-RFE2 * *

ESC-RFE3 * *

ESC-RFE4 * *

ESC-RFE5 * *

Ma Wan Station

MW1 * *

Flood Tide

Impact Station

ESC-IPF1 * *

ESC-IPF2 * *

ESC-IPF3 * *


ESC-INF1 * *

ESC-INF2 * *

ESC-INF3 * *

Reference Station

ESC-RFF1 * *

ESC-RFF2 * *

ESC-RFF3 * *

Ma Wan Station

MW1 * *

20142012 2013

Routine Water Quality Monitoring J F M A M J J A S O N D J F M A M J J A S O N D J F

Ebb Tide

Impact Station

ESC-IPE1 * * * * * * * * * * * * *

ESC-IPE2 * * * * * * * * * * * * *

ESC-IPE3 * * * * * * * * * * * * *

ESC-IPE4 * * * * * * * * * * * * *

ESC-IPE5 * * * * * * * * * * * * *


ESC-INE1 * * * * * * * * * * * * *

ESC-INE2 * * * * * * * * * * * * *

ESC-INE3 * * * * * * * * * * * * *

ESC-INE4 * * * * * * * * * * * * *

ESC-INE5 * * * * * * * * * * * * *

Reference Station

ESC-RFE1 * * * * * * * * * * * * *

ESC-RFE2 * * * * * * * * * * * * *

ESC-RFE3 * * * * * * * * * * * * *

ESC-RFE4 * * * * * * * * * * * * *

ESC-RFE5 * * * * * * * * * * * * *

Ma Wan Station

MW1 * * * * * * * * * * * * *

Flood Tide

Impact Station

ESC-IPF1 * * * * * * * * * * * * *

ESC-IPF2 * * * * * * * * * * * * *

ESC-IPF3 * * * * * * * * * * * * *


ESC-INF1 * * * * * * * * * * * * *

ESC-INF2 * * * * * * * * * * * * *

ESC-INF3 * * * * * * * * * * * * *

Reference Station

ESC-RFF1 * * * * * * * * * * * * *

ESC-RFF2 * * * * * * * * * * * * *

ESC-RFF3 * * * * * * * * * * * * *

Ma Wan Station

MW1 * * * * * * * * * * * * *

Water Column Profiling J F M A M J J A S O N D J F M A M J J A S O N D J F

Plume Stations WCP1 * * * * * * * * * * * * * * * * * * *

WCP2 * * * * * * * * * * * * * * * * * * *

Benthic Recolonisation Studies J F M A M J J A S O N D J F M A M J J A S O N D J F

Capped Contaminated Mud Pits IVa-c

ESC-CPA * * * *

ESC-CPB * * * *

ESC-CPC * * * *

Reference Stations

ESC-RBA * * * *

ESC-RBB * * * *

ESC-RBC * * * *

Impact Monitoring for Dredging J F M A M J J A S O N D J F M A M J J A S O N D J F

Upstream/Reference Stations

US1 * * * * * * * * * * * * * * * * * *

US2 * * * * * * * * * * * * * * * * * *

Downstream/Impact Stations

DS1 * * * * * * * * * * * * * * * * * *

DS2 * * * * * * * * * * * * * * * * * *

DS3 * * * * * * * * * * * * * * * * * *

DS4 * * * * * * * * * * * * * * * * * *

DS5 * * * * * * * * * * * * * * * * * *

Ma Wan Station

MW1 * * * * * * * * * * * * * * * * * *

Sampling completed

Sampling to be completed

2012 2013 2014

Annex B

Monitoring Results

Figure 1: Concentration of Metals (Cr, Cu, Ni, Pb, Zn, As; mean +SD) in sediment samples

collected from Pit Specific Sediment Chemistry Monitoring for CMP Va in February

2013.

Figure 2: Concentration of Metals (Cd, Hg, Ag; mean +SD) in sediment samples collected from

Pit Specific Sediment Chemistry Monitoring for CMP Va in February 2013.

Source: H:\Team\EM\GMS Projects\0103262 CEDD EM&A for CMP at Sha Chau\05

Deliverables\01 CMP\05 Monthly Reports\45th (Mar 13)

Date: 16/4/13

Environmental

Resources

Management

Figure 3: Concentration of Total Organic Carbon (mg/kg dry weight; mean +SD) in sediment

samples collected from Pit Specific Sediment Chemistry Monitoring for CMP Va in

February 2013.

Figure 4: Concentration of Tributyltin (µg TBT/kg; mean +SD) in sediment samples collected

from Pit Specific Sediment Chemistry Monitoring of CMP Va in February 2013.



Date: 16/4/13

Environmental

Resources

Management

Figure 5: Concentration of Low and High Molecular Weight Polycyclic Aromatics Hydrocarbons

(PAHs) (µµµµg/kg; mean +SD) in sediment samples collected from Pit Specific Sediment

Chemistry Monitoring for CMP Va in February 2013.



Date: 16/4/13

Environmental

Resources

Management

Figure 6: Concentration of Metals (Cr, Cu, Ni, Pb, Zn, As; mean + SD) in sediment samples

collected from Cumulative Impact Sediment Chemistry Monitoring for CMP Va in

February 2013.

Figure 7: Concentration of Metals (Cd, Hg, Ag; mean + SD) in sediment samples collected from

Cumulative Impact Sediment Chemistry Monitoring of CMP Va in February 2013.



Date: 16/4/13

Environmental

Resources

Management

Figure 8: Concentration of Total Organic Carbon (TOC) (mg/kg dry weight; mean + SD) in

sediment samples collected from Cumulative Impact Sediment Chemistry Monitoring

of CMP Va in February 2013.

Figure 9: Concentration of Tributyltin (µg TBT/kg; mean + SD) in sediment samples collected

from Cumulative Impact Chemistry Monitoring of CMP Va in February 2013.



Date: 16/4/13

Environmental

Resources

Management

Annex C

Results of Impact

Monitoring during CMP Vd

Dredging Operations for

March 2013

ANNEX C - 1

Table C1 Summary Table of DO, Turbidity and SS Levels Recorded in March 2013

Sampling

Date

Tidal

Period

Station Average DO Levels

(mg/L)

Average

Turbidity

Level

(NTU)

Average SS

Level

(mg/L) Bottom Surface and

Mid Depth

2013/3/16 ME DS1 7.18 7.16 6.38 8.00

DS2 7.09 7.27 5.38 6.83

DS3 7.19 7.28 4.70 5.33

DS4 7.20 7.36 4.48 5.50

DS5 7.29 7.39 3.83 4.50

MW1 7.20 7.21 1.92 3.50

US1 7.12 7.19 8.52 9.50

US2 7.11 7.16 8.55 11.17

MF DS1 6.93 6.97 11.40 13.83

DS2 7.01 7.03 7.05 10.83

DS3 6.96 7.01 7.97 9.83

DS4 6.98 7.01 7.17 10.83

DS5 7.01 6.99 10.32 15.17

MW1 6.92 6.98 1.85 3.67

US1 7.01 7.00 9.87 11.17

US2 7.05 7.04 6.90 8.50

Notes:

1. Please refer to Table C2 below for the Action and Limit Levels for dredging activities.

2. Cell shaded yellow indicated value exceeding the Action Level criteria.

3. Cell shaded red indicated value exceeding the Limit Level criteria.

ANNEX C - 2

Table C2 Action and Limit Levels of Water Quality for Dredging Activities

Parameter Action Level Limit Level

Dissolved Oxygen (DO) (1) Surface and Mid-depth (2) Surface and Mid-depth (2)

5%-ile of baseline data for surface

and middle layer = 3.76 mg L-1

and

Significantly less than the reference

stations mean DO (at the same tide

of the same day)

1%-ile of baseline data for surface

and middle layer = 3.11 mg L-1 (3)

and



of the same day)

Bottom Bottom

5%-ile of baseline data for bottom

layers = 2.96 mg L-1

and



of the same day)

The average of the impact station

readings are <2 mg/L

and



of the same day)

Depth-averaged

Suspended Solids (SS) (4) (5)

95%-ile of baseline data for depth

average = 37.88 mg L-1

and

99%-ile of baseline data for depth

average = 61.92 mg L-1

and

120% of control station's SS at the

same tide of the same day

130% of control station's SS at the


Depth-averaged Turbidity

(Tby) (4) (5)

95%-ile of baseline data = 28.14

NTU

and

99%-ile of baseline data = 38.32

NTU

and

120% of control station's Tby at the


130% of control station's Tby at the


Notes:

(1) For DO, non-compliance of the water quality limits occurs when monitoring result is lower than

the limits.

(2) The Action and Limit Levels for DO for Surface & Middle layers were calculated from the

combined pool of baseline surface layer data and baseline middle layer data.

(3) Given the Action Level for DO for Surface & Middle layers has already been lower than 4 mg L-1,

it is proposed to set the Limit Level at 3.11 mg L-1 which is the first percentile of the baseline

data.

(4) “Depth-averaged” is calculated by taking the arithmetic means of reading of all three depths.

(5) For turbidity and SS, non-compliance of the water quality limits occurs when monitoring result

is higher than the limits.

Annex D

Study Programme

ID Task Name

1 Project Commencement

2

3 For CMP IV and New Facility at East Sha Chau

4

5 Submission of Draft Inception Report & Draft Programme

6 Submission of Final Inception Report & Final Programme

7 Submission of Draft Operations Manual

8 Submission of Final Operations Manual

9 Submission of Operations Manual Updates

17 Submission of Draft Monitoring And Audit Manual (Rev 1)

18 Submission of Final Monitoring And Audit Manual (Rev 1)

19 Submission of Draft Monitoring And Audit Manual (Rev 2)

20 Submission of Final Monitoring And Audit Manual (Rev 2)

21 Submission of EM&A Manual Updates

29

30 Monitoring Contract Works

31 Prepare Draft Letters of Invitation, Gazette Documents & Tender Documents

32 Submission of Draft Tender Documents

33 Submission of Draft Gazette Documents

34 Submission of Final Tender Documents

35 Submission of Final Gazette Documents

36 Tendering and Tender Assessment

37 Prepare Contact Documents

38 Submission of Contract Documents

39 Administrate and Supervise Contracted Field and Laboratory Works

40 Submission of Report on Dredging & Capping Operations

49 Monthly Progress Report

101 Quarterly EM&A Reports

115 Submission of Annual Review Report

120 Submission of Annual Risk Assessment Report

125 Submission of Draft Final Report

126 Submission of the Final Report

127 Submission of Draft Executive Summary Report

128 Submission of Final Executive Summary Reports

129

130 For East Tung Lung Chau Disposal Facility

131

132 Submission of Monitoring Results & Monthly EM&A Progress Report

133 October 2009

134 November 2009

135 December 2009

136 January 2010

08/07

21/07

04/08

21/07

04/08

14/07

18/08

20/10

24/11

03/11

03/11

17/11

17/11

12/01

13/09

27/09

11/10

11/10

10/11

10/12

11/01

10/02

M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A2009 2010 2011 2012 2013

Task

Progress

Milestone

Summary

Rolled Up Task

Rolled Up Milestone

Project: Agreement No. CE 4/2009 (EP) Environmental Monitoring and Audit for Contaminated Mud Pits at Sha Chau (2009-2013) - Investigation

Figure 4.1 - Study Programme

ID Task Name

137 February 2010

138 March 2010

139 October 2010

140 November 2010

141 December 2010

142 January 2011

143 February 2011

144 March 2011

145 October 2011

146 November 2011

147 December 2011

148 January 2012

149 February 2012

150 March 2012

151 October 2012

152 November 2012

153 December 2012

154 January 2013

155 February 2013

156 March 2013

157 Submission of Initial Review Report

158 Submission of Quarterly EM&A Report

159 Quarter 1 2010

160 Quarter 2 2010

161 Quarter 3 2011

162 Quarter 4 2011

163 Quarter 5 2012

164 Quarter 2 2012

165 Quarter 1 2013

166 Submission of Annual Report

167 Annual Report 1 2010



170

171 Alternative / Modified Capping Design

172

173 Submission of Investigation Report

174 Submission of Annual Report

175 Capping Design Annual Report 2010



10/03

12/04

10/11

10/12

10/01

10/02

10/03

11/04

10/11

12/12

10/01

10/02

12/03

10/04

12/11

10/12

10/01

11/02

11/03

10/04

22/11

01/04

01/12

01/04

01/12

02/04

03/12

01/04

28/01

30/01

28/01

08/12

28/01

30/01

28/01

M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A2009 2010 2011 2012 2013

Task

Progress

Milestone

Summary

Rolled Up Task

Rolled Up Milestone

Project: Agreement No. CE 4/2009 (EP) Environmental Monitoring and Audit for Contaminated Mud Pits at Sha Chau (2009-2013) - Investigation

Figure 4.1 - Study Programme